It's the first time the annual trade show has been canceled in its 53-year history.
Event organizers said they made the decision Thursday because of COVID-19 travel restrictions and health orders issued by the City of Madison and Dane County.
The event described as the Super Bowl of dairy attracts tens of thousands of people from around the world.
In 2019, the event attracted more than 62,000 people from nearly 100 countries.
Organizers say the event will return in the fall of 2021.
But the Milwaukee Journal Sentinel reports there are no plans to reschedule for this year.